treewide: format all files (#57)

Run `nix fmt` at the root of the repository to format all files. I've
done this on my fork and this will help me merge your changes later
without having to deal with un-formatted files.

config/plugins/cmp/cmp.nix

@@ -1,28 +1,40 @@
 {
   plugins = {
-    cmp-emoji = {enable = true;};
+    cmp-emoji = {
+      enable = true;
+    };
     cmp = {
       enable = true;
       settings = {
         autoEnableSources = true;
-        experimental = {ghost_text = false;};
+        experimental = {
+          ghost_text = false;
+        };
         performance = {
           debounce = 60;
           fetchingTimeout = 200;
           maxViewEntries = 30;
         };
-        snippet = {expand = "luasnip";};
-        formatting = {fields = ["kind" "abbr" "menu"];};
+        snippet = {
+          expand = "luasnip";
+        };
+        formatting = {
+          fields = [
+            "kind"
+            "abbr"
+            "menu"
+          ];
+        };
         sources = [
-          {name = "git";}
-          {name = "nvim_lsp";}
-          {name = "emoji";}
+          { name = "git"; }
+          { name = "nvim_lsp"; }
+          { name = "emoji"; }
           {
             name = "buffer"; # text within current buffer
             option.get_bufnrs.__raw = "vim.api.nvim_list_bufs";
             keywordLength = 3;
           }
-          {name = "copilot";}
+          { name = "copilot"; }
           {
             name = "path"; # file system paths
             keywordLength = 3;
@@ -34,8 +46,12 @@
         ];
 
         window = {
-          completion = {border = "solid";};
-          documentation = {border = "solid";};
+          completion = {
+            border = "solid";
+          };
+          documentation = {
+            border = "solid";
+          };
         };
 
         mapping = {
@@ -51,11 +67,21 @@
         };
       };
     };
-    cmp-nvim-lsp = {enable = true;}; # lsp
-    cmp-buffer = {enable = true;};
-    cmp-path = {enable = true;}; # file system paths
-    cmp_luasnip = {enable = true;}; # snippets
-    cmp-cmdline = {enable = false;}; # autocomplete for cmdline
+    cmp-nvim-lsp = {
+      enable = true;
+    }; # lsp
+    cmp-buffer = {
+      enable = true;
+    };
+    cmp-path = {
+      enable = true;
+    }; # file system paths
+    cmp_luasnip = {
+      enable = true;
+    }; # snippets
+    cmp-cmdline = {
+      enable = false;
+    }; # autocomplete for cmdline
   };
   extraConfigLua = ''
         luasnip = require("luasnip")